Projection apparatus.



Patented Oct. 24, 1916.

W. L. PATTERSON.

PROJECTION APPARATUS.

APPLICATION FILED AUG-30. 1912.

W. L. PATTERSON.

PROJECTION APPARATUS.

APPLICATION FILED AUG-30,1912. I LPTJPMT Patented 0%. 24,1916.

2 SHEETS-SHEET Z.

IIII'HI muM vio'a ml/11817245. pawzwson/ rangement which mterchangeably employed in i s i WILLIAM L. JPATTERSGN, UTE I;tOCHE.'5TE1%, NLlVlf YORK, ASSIGNUR T BAUSCH & LOMJB OPTICAL COMPANY, 035

ROCHESTER, NEW] YORK, CORPORATION OF HEY/V YORK.

PROJECTION APPARATUS.

Specification of Letters Patent.

Application filed august 36, 1312. Serial 1%. 717,84?

To all whom it may concern:

Be it known tha I, WILIJAM L. Pvr'rnnsoN, of vRochester, in the county of Monroe and State of New i" rk, have invented certain new and useful improvements in Projection Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part oil this specification, and. to the reference numerals marked thereon.

itiy present invention relates to improve ments in projection apparatus, and it has for one of its objects to providea novel arpernuts ditlerent types of lamps to be the same ap 'iaratus.

A further object of the invention consists in the proiision of means for supporting a condensing lens in the lamp house. so as to enabl a cooling chamber to be used between the lenses, it desired.

To these and other ends the invention con sists in certain improvements and combinations of parts, all as will be hereinafter more lully described. the novel ileatures being pointed out in the claims at the end of the specilioatioi'i.

in the drawings, l igure l is a vertical sectional view showing the application of my invention, with a cooling ri ambe between the lenses, one ol' the condensing lenses being arranged within the lamp house: Fin. 2 is a transverse sectional view ol',the lamp shown in Fig. 1; Fig. is a sectional view on the line 7"T of Fig. '1; Fill. l is a vertical sectional view showing another type of lamp house to! use with an are light; and Fig. is a similar view, the parts lwingnlrrangml to receive one of the condensing lenses within the lamp house.

Similar rel'm'ence numerals throughout the several linures indicate the same parts.

in the present embodiment of the invention there is employed a lrame generally such as employed in this type of apparatus, on which is mounted a support (l adapted to i'rri-ivc a lens holder ol' any suitable form.

The lrame is arranged to receive interhangeable lamphouses. so as to adapt the apparatus for use either with incamlescent or are lamps, and to this end it includes, vertically disposed guideways l, which receive the slides iii any suitable manner to the lamp house 3.

4; designates a lamp, the latter being mounted on the support -5 which carries flanges 6 arranged to engage track 7 formed on the bottom of the lamp house, whereby the lamp may be moved back and forth within the lamp house for a purpose that will presently appear. By simply lifting the lamp house vertically, it can be removed and another substituted readily, to enable an incandescent and are light to be interchangeably employed. 7 i

in using a projection apparatus of this character in connection with films, it is desirable to employ a cooling chamber to prevent curling: ot' the film under the influence of the heat. lnder such conditions, the space between the lamp hous and plate is sullicient to accommmlate a cooling, chamber, and it is desirable to arrange one of the lenses in the lamp house. To this end, the lamp house is preferably provided with a lens holder 8 which may be of any suitable 'lorm, and is preferably constructed in accordanre with the previously mentioned ,holder l). and as shown in Fig. 3. 9 is a support for the lens holder which is arranged in the bottom of the lamp house. In order to cnable lens holder and lens to be readily positioned. in the lamp house, I provide the latter with a detachable top or cover 10 which is slidably engaged with the body portion 11 ot' the lamp house. When the lens holder 8 is arranged within the lamp house. the lamp support 5 is moved rearwardly to the position shown in Fig. 1, so that it occupies the proper position relatively to the system of (amdcusiine lenses.

12 designates the coolin, chamber which is arranged on the support (l. so as to be in position between the two lenses of the system.

Tn Figs. 4 and 5 l have shown a lamp house arranged to receive an are light, the body portion ol which is designated gonerally at 133. ll is a support for the are light body which is rcmovably attached to the lamp house and may be sccurcd either inside or outside, as shown in Figs. 4 and 5, respectively. so that the light may be moved to maintain its proper relation to the condensint lens when the eooling chamber is our 2, the latter being attached ployed between the lenses. That is to say,

when one of the lenses is arranged within position shown in the same figure.

I claim as my invention:

1. In a projection apparatus, the combination with a frame having a lamp house thereon, a lens disposed on the frame in advance of the lamp house, a cooling chamber arranged between said lens and the lamp house, a support within the lamp house at the forward part thereof, and a lens holder removably arranged on said support.

2. In a projection apparatus, the combination with a frame and a lamp house mounted thereon, of a lens disposed on the frame in advance of the lamp house, a cooling chamber arranged between said lens and the lamp house, and a lens holder for a second lens removably positioned within the lamp house.

3. In a projection appa 'atus, the combination with a frame having a support for a lens, a cooling chamber, of a pair of vertically disposed guideways arranged at the rear edge of said support, a removable lamp house provided with vertical slides attached thereto and having engagement with the aforesaid .guideways at the rear edge of the support, a second support at the'forward portion of the lamp house, and a lens holder removably arranged on the last mentioned support immediately in the rear of said slides.

WILLIAM L. PATTERSON Witnesses IVILLIAM G. IVooDwon'rIi, DANIEL M. SMITH. 

